Structural and electrical properties of Ce{sub 0.75}(Gd{sub 0.95−x}Sr{sub x}Ca{sub 0.05}){sub 0.25}O{sub 2−δ} thick film electrolyte

Journal Article · Sun Dec 15 00:00:00 EST 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.05.068· OSTI ID:22290352

Lee, Seung-Hwan; Kim, Hyun-Ju; Kim, Seung-Hyun; Kim, Hong-Ki ^[1]; Lee, Sung-Gap ^[2]; Yoon, Jung-Rag ^[3]; Lee, Young-Hie ^[1]

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1. Department of Electronics Materials Engineering, Kwangwoon University, Seoul (Korea, Republic of)
2. Department of Ceramic Engineering, Gyeongsang National University, Jinju (Korea, Republic of)
3. R and D Center, Samwha Capacitor, Yongin-si (Korea, Republic of)

Graphical abstract: - Highlights: • Effects of Sr doping on electrical properties and structure were investigated. • The samples have higher conductivity and low activation energy. • Cause of increase oxygen vacancy concentration in the grain boundary. - Abstract: The effects of Sr doping on the electrical properties of Ce{sub 0.75}(Gd{sub 0.95−x}Sr{sub x}Ca{sub 0.05}){sub 0.25}O{sub 2−δ} (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05 mol%) electrolytes thick films were investigated. The samples sintered at 1400 °C for 8 h. X-ray diffraction (XRD) showed typical XRD patterns of a cubic fluorite structure, and the ionic conductivity was examined by AC impedance spectroscopy. From the experimental results, it was observed that Ce{sub 0.75}(Gd{sub 0.95−x}Sr{sub x}Ca{sub 0.05}){sub 0.25}O{sub 2−δ} (x = 0.04 mol%) electrolytes thick film have higher conductivity and minimum activation energy at 600 °C. This is explained in terms of the increased in the oxygen vacancy concentration at the grain boundary.

• OSTI ID: 22290352
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 12; Conference: ISFM 2012: 5. international symposium on functional materials, Perth, WA (Australia), 17-20 Dec 2012; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTIVATION ENERGY
CONCENTRATION RATIO
ELECTROLYTES
FILMS
FLUORITE
GRAIN BOUNDARIES
IONIC CONDUCTIVITY
OXYGEN
X-RAY DIFFRACTION